meaning totally uncertain, a connection with Akk. kâpu ‘to bend’ assumed by Watson (2007: 69) is possible, but certainly not in terms of an Akkadian borrowing in Ugaritic (Kogan 2015: 363)
kms - to buckle, to bend
(DUL 446, Watson 2007: 88)
As reasonably surmised in HALOT 1109, it is to this root that the Ugaritic verb ḳmṣ ‘to curl up, to bend’ likely belongs. This comparison invalidates Watson’s conclusion that Ugr. ḳmṣ is borrowed from Akkadian (Watson 2007:101).